Finding the Fourth Proportional to 42,128,145.40, 59,059,029.80 and 42,128,145.40

Step by Step Solution

1. Step 1: Write the proportion equation
   42,128,145.40 : 59,059,029.80 = 42,128,145.40 : x
2. Step 2: Convert to fraction form
   42,128,145.40/59,059,029.80 = 42,128,145.40/x
3. Step 3: Cross multiply
   42,128,145.40x = 59,059,029.80 × 42,128,145.40
4. Step 4: Simplify right side
   42,128,145.40x = 2,488,047,394,597,332.50
5. Step 5: Solve for x
   x = 2,488,047,394,597,332.50/42,128,145.40
6. Step 6: Final answer
   x = 59,059,029.80